/*
 * Copyright (c) 2021 Huawei Device Co., Ltd.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import {
    expect
} from 'chai';
import 'mocha';
import {
    EcmaCreateemptyarray,
    EcmaLdobjbyname,
    EcmaNewobjdynrange,
    EcmaNewobjspreaddyn,
    EcmaReturnundefined,
    EcmaStarrayspread,
    EcmaTryldglobalbyname,
    Imm,
    LdaDyn,
    LdaiDyn,
    MovDyn,
    ResultType,
    StaDyn,
    VReg
} from "../../src/irnodes";
import { checkInstructions, compileMainSnippet } from "../utils/base";

describe("NewTest", function () {
    it("new Object", function () {
        let insns = compileMainSnippet("new Object");
        let arg0 = new VReg();
        let targetReg = new VReg();

        let expected = [
            new EcmaTryldglobalbyname("Object"),
            new StaDyn(arg0),
            new MovDyn(targetReg, arg0),

            new EcmaNewobjdynrange(new Imm(ResultType.Int, 2), [arg0, targetReg]),

            new EcmaReturnundefined()
        ];

        expect(checkInstructions(insns, expected)).to.be.true;
    });

    it("new Object()", function () {
        let insns = compileMainSnippet("new Object()");
        let arg0 = new VReg();
        let targetReg = new VReg();

        let expected = [
            new EcmaTryldglobalbyname("Object"),
            new StaDyn(arg0),
            new MovDyn(targetReg, arg0),

            new EcmaNewobjdynrange(new Imm(ResultType.Int, 2), [arg0, targetReg]),

            new EcmaReturnundefined()
        ];

        expect(checkInstructions(insns, expected)).to.be.true;
    });

    it("new Object(2)", function () {
        let insns = compileMainSnippet("new Object(2)");
        let arg0 = new VReg();
        let arg1 = new VReg();
        let targetReg = new VReg();

        let expected = [
            new EcmaTryldglobalbyname("Object"),
            new StaDyn(arg0),
            new MovDyn(targetReg, arg0),

            new LdaiDyn(new Imm(ResultType.Int, 2)),
            new StaDyn(arg1),

            new EcmaNewobjdynrange(new Imm(ResultType.Int, 3), [arg0, targetReg, arg1]),

            new EcmaReturnundefined()
        ];

        expect(checkInstructions(insns, expected)).to.be.true;
    });

    it("new obj.ctor()", function () {
        let insns = compileMainSnippet("let obj; new obj.ctor()");
        let obj = new VReg();
        let arg0 = new VReg();
        let temp = new VReg();
        let targetReg = new VReg();

        let expected = [
            new EcmaTryldglobalbyname('obj'),
            new StaDyn(temp),

            new EcmaLdobjbyname("ctor", obj),
            new StaDyn(arg0),
            new MovDyn(targetReg, arg0),

            new EcmaNewobjdynrange(new Imm(ResultType.Int, 2), [arg0, targetReg]),
        ];

        insns = insns.slice(2, insns.length - 1);

        expect(checkInstructions(insns, expected)).to.be.true;
    });

    it("new Object(...args)", function () {
        let insns = compileMainSnippet(`new Object(...args);`);
        let arg0 = new VReg();
        let elemIdxReg = new VReg();
        let targetReg = new VReg();
        let arrayInstance = new VReg();

        let expected = [
            new EcmaTryldglobalbyname("Object"),
            new StaDyn(arg0),
            new MovDyn(targetReg, arg0),

            new EcmaCreateemptyarray(),
            new StaDyn(arrayInstance),
            new LdaiDyn(new Imm(ResultType.Int, 0)),
            new StaDyn(elemIdxReg),

            new EcmaTryldglobalbyname("args"),
            new EcmaStarrayspread(arrayInstance, elemIdxReg),
            new StaDyn(elemIdxReg),
            new LdaDyn(arrayInstance),

            new EcmaNewobjspreaddyn(arg0, targetReg),

            new EcmaReturnundefined()
        ];

        expect(checkInstructions(insns, expected)).to.be.true;
    });
});
